Adobe 22011292 User Manual - Page 107

USING ADOBE AUDITION 103 Effects reference • Spectral Decay Rate Keep at 0% for faster processing. Set between 80% and 98% to smooth out background distortions. Center and Side Channel Levels Specifies how much of the selected signal you want to extract or remove. Move the sliders up to include additional material. Advanced options Click the triangle to access these settings: • FFT Size Specifies the Fast Fourier Transform size, with low settings improving processing speed, and high settings improving quality. In general, settings between 4096 and 8192 work best. • Overlays Defines the number of FFT windows that overlap. Higher values can produce smoother results or a chorus-like effect, but they take longer to process. Lower values can produce bubbly-sounding background noises. Values of 3 to 9 work well. • Window Width Specifies the percentage of each FFT window. Values of 30% to 100% work well. More Help topics "Applying effects in the Waveform Editor" on page 62 "Applying effects in the Multitrack Editor" on page 63 "Use effect presets" on page 61 Time and pitch manipulation effects Stretch and Pitch effect (Waveform Editor only) The Time And Pitch > Stretch And Pitch effect lets you change the pitch of an audio signal, the tempo, or both. For example, you can use the effect to transpose a song to a higher key without changing the tempo, or you can use it to slow down a spoken passage without changing the pitch. Note: This effect requires offline processing. While it is open, you cannot edit the waveform, adjust selections, or move the current-time indicator. Algorithm Choose IZotope Radius to simultaneously stretch audio and shift pitch, or Audition to change stretch or pitch settings over time. The iZotope Radius algorithm requires longer processing but introduces fewer artifacts. Precision Higher settings produce better quality but require more processing time. New Duration Indicates how long the audio will be after time-stretching. You can either adjust the New Duration value directly, or indirectly by changing the Stretch percentage. If you commonly stretch files to a certain duration, click the Favorite icon to save that setting for future use. To apply a favorite to multiple files, see "Batch process files" on page 57. Lock Stretch Settings to New Duration Overrides custom or preset Stretch settings, instead calculating them from duration adjustments. Select the option above to quickly make radio spots 30 or 60 seconds long. Stretch Shortens or extends processed audio relative to existing audio. For example, to shrink audio to half its current duration, specify a Stretch value of 50%. Pitch Shift Tonally shifts audio up or down. Each semitone equals one half-step on a keyboard. Last updated 2/16/2012